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#1 |
Senior Member
![]() Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Swapped Intakes Now Trucks isnt Running Right
I swapped the offenhauser 360 degree intake on my truck for a Edelbrock Performer EPS. The truck still runs but just barely. I have had tho advance the distributor well past where it was for the 360 intake. When you try to take off the truck bogs down and tries to stall. If you keep the rpms up you can take off but it shutters and jerks all the way through the gears. I think is also running rich. I starting to think that the jets are not stock in the carb (its a Holley 600). Anything else I'm missing?
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1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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#2 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,626
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Re: Swapped Intakes Now Trucks isnt Running Right
What was the original timing and what do you need to set it at to run right?
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#3 |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,515
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Re: Swapped Intakes Now Trucks isnt Running Right
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Also, is it the same carb? LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#4 |
Senior Member
![]() Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Re: Swapped Intakes Now Trucks isnt Running Right
It is the same carb. I do not know the exact numbers because the timing tab on my truck doesn't have numbers just notches. It was between the first and second notches with the 360. I do not know where it is showing on the tab right now. I was rushed yesterday. I do know that the vacuum advance is rotated further. The lines on the advance are at their limit. They were not like that originally.
__________________
1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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#5 |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,515
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Re: Swapped Intakes Now Trucks isnt Running Right
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Sounds like you might have the dist. at least one tooth off. I would check that, re-check plug wires, and check for vacuum leaks. Maybe geezer will have some more ideas... LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#6 |
Senior Member
![]() Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Re: Swapped Intakes Now Trucks isnt Running Right
I made sure I pulled and installed at TDC but I will double check. I thought vacuum leak so I sprayed car cleaner around the carb and intake gaskets. It didn't change the idle.
__________________
1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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#7 |
Registered User
![]() Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,208
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Re: Swapped Intakes Now Trucks isnt Running Right
Sounds like the dist is about two teeth off.
Pull the #1 spark plug and rotate the engine around to TDC. See there the rotor is pointing.. maybe post up a picture and well help you get it figured out. With the engine at TDC the rotor should be 'pointing' at #1 (or relatively close) Good place to start anyway ![]()
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#8 |
Registered User
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Location: Chattanooga TN
Posts: 6,208
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Re: Swapped Intakes Now Trucks isnt Running Right
^^ sorry for the double post there,.. I guess we were typing at the same time.
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#9 |
Senior Member
![]() Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Re: Swapped Intakes Now Trucks isnt Running Right
Well I guess I know what I'm doing when I get home.
__________________
1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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#10 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,626
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Re: Swapped Intakes Now Trucks isnt Running Right
You don't need numbers on the timing tab if you know each line on it is 2 degrees.
Plug the vac line to the carb, set your timing at 12 and see if that helps. Check for vacuum leaks too. Also one thing lots of people don't know about is that if you put a longer bolt in a bolt hole that has a pushrod lined up with it, that the longer bolt can interfere with the pushrod action holding a valve open causing poor running. Also check the float level in your carb as a last resort if you find nothing else. |
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#11 |
Registered User
![]() Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,208
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Re: Swapped Intakes Now Trucks isnt Running Right
The ole #5 and #7 spark plug wires getting crossed up could cause it too.
1,8,4,3,6,5,7,2 It's easy to get 5 and 7 crossed when you put things back together. Ask me know I know ![]()
__________________
Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#12 |
Proprietor of Dale's Corner
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Location: Vacaville , CA
Posts: 16,129
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Re: Swapped Intakes Now Trucks isnt Running Right
X2 I have seen it more than once
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#13 |
Senior Member
![]() Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Re: Swapped Intakes Now Trucks isnt Running Right
It looks like the Distributor was off a tooth. The truck is running much better now thanks for the help.
__________________
1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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#14 | |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,515
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Re: Swapped Intakes Now Trucks isnt Running Right
Quote:
LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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